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Process for producing corosolic acid

  • US 20050020681A1
  • Filed: 06/15/2004
  • Published: 01/27/2005
  • Est. Priority Date: 06/16/2003
  • Status: Active Grant
First Claim
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1. A process for producing corosolic acid or a corosolic acid ester, which comprises the steps of:

  • a) oxidizing a compound of formula III;

    embedded image[where R1 is a hydrogen atom or a C1-C6 alkyl] to a compound of formula IV;

    embedded image[where R1 is a hydrogen atom or a C1-C6 alkyl]; and

    b) reducing the compound of formula IV to corosolic acid of formula I;

    embedded image[where R1 is a hydrogen atom or a C1-C6 alkyl] or a corosolic acid ester.

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